The FR4 plate is designed for users who want a balanced feeling between sound and flex.
Want to try other plate materials? Try the POM for more flexibility or the Aluminum for a higher sound profile.
*Disclamier: only Polycarbonate and Aluminum plate comes with screw slots. It is up to the user whether to use them. For other plates, the switches are used to properly fix the PCB and plate to reach ultra flex experiences.